@misc{10481/71412,
year = {2021},
month = {8},
url = {http://hdl.handle.net/10481/71412},
abstract = {A new method to synthesize integral carbon monoliths with a controlled channel morphology has been
developed in this work by combining 3D-printing technology and sol–gel polymerization. By this method,
robust and consistent carbon monoliths were obtained with a perfect replica of the channel architecture at
a microscale range. As a proof of concept, a carbon monolith with tortuous channels that split and join
successively along the monolith length has been designed, fabricated and tested as a CuO/CeO2 support
for the preferential oxidation of CO in the presence of H2 (CO-PrOx), which is a topic of ongoing research
for H2 purification in fuel cells. The behavior of this novel carbon monolith catalyst has been compared
with that of a counterpart catalyst prepared with a conventional honeycomb design. Results shown that
the wide macroporosity of the carbon network favors the anchoring and dispersion of the active phase
both in the channel surface and the carbon network. The channel architecture affects the gas diffusion
both through the channel and the carbon network and consequently, affects the active phase accessibility
and activity. T50 (the temperature to achieve 50% CO conversion) decreases by almost 13 °C at 240 mL
min−1 in the carbon monolith with tortuous channels (T50 = 79.7 °C) compared to the honeycomb
monolith (T50 = 93.1 °C). The turbulent path created by the tortuous channels favours the active phase–gas
contact and even the gas diffusion inside the macropores of the carbon skeleton improving the catalytic
performance of the active phase compared to that by the conventional honeycomb design. Thus, this work
demonstrates the potential of 3D printing to improve the catalytic supports currently available.},
organization = {Spanish Government	PID2019-105960RB-C22},
organization = {University of Alicante	GRE18-01A},
organization = {Generalitat Valenciana},
organization = {European Commission},
organization = {General Electric	PROMETEO/2018/076	
GV2020-075	
GRISOLIAP/2017/177	
APOSTD/2019/030},
organization = {Junta de Andalucia	P18-RTJ-2974},
organization = {UE (FEDER funding)},
publisher = {Royal Society of Chemistry},
title = {Design and fabrication of integral carbon monoliths combining 3D printing and sol-gel polymerization: effect of the channels morphology on the CO-PROX reaction},
doi = {10.1039/d1cy01104a},
author = {Chaparro Garnica, Cristian Yesid and Bailón García, Esther},
}